Is Your GM Vehicle Stalling, Running Rough, or Refusing to Start?
As a mechanic with over two decades of diagnostic experience, I’ve seen countless vehicles sidelined by a faulty Engine Control Module (ECM). The symptoms can be maddeningly intermittentโone day it’s a check engine light, the next it’s a no-start condition that leaves you stranded. Your vehicle’s ECM is its brain, and when it fails, it can cause a cascade of problems that are often misdiagnosed, costing you time and money on parts you don’t need. This isn’t just an inconvenience; it’s a critical failure that compromises your vehicle’s performance and reliability.
The Direct-Fit, Programmed Solution You Need
This Engine Control Module, service number 12636659, is the definitive solution for a wide range of GM cars, trucks, and SUVs. The biggest hurdle with ECM replacement has always been the expensive and time-consuming programming required at a dealership. We eliminate that step entirely. When you provide your Vehicle Identification Number (VIN) during checkout, our technicians will program this module with the latest, most stable software directly from GM. It arrives at your door ready for a straightforward, plug-and-play installation.
From My Bay to Your Driveway: A Real-World Scenario
“A customer’s 2011 GMC Canyon came in last week with these exact symptoms: intermittent stalling at stoplights and a persistent P0606 (ECM Processor Fault) code. The owner had already replaced the throttle body and a camshaft sensor with no luck. After confirming power and ground at the ECM connector were solid, we knew the module itself was the culprit. Instead of a costly tow to the dealer, we ordered a VIN-programmed unit just like this one. The installation took less than 30 minutes, and the truck has been running perfectly ever since. This is the most efficient and reliable way to handle these repairs.”
Common Symptoms of a Failing GM ECM:
- โ Check Engine Light with communication-related or processor fault codes (e.g., P0601, P0606).
- โ Engine stalling or cutting out unexpectedly while driving.
- โ Complete no-start condition where the engine cranks but won’t fire.
- โ Poor fuel economy and noticeable loss of power.
- โ Harsh or erratic automatic transmission shifting.
- โ Issues with other electronic systems, like cooling fans running constantly.
Simple Installation for Your 2009 Corvette Engine Control Module
You don’t need to be a master technician to complete this job. By having the module pre-programmed, you’ve already done the hardest part. Follow these steps for a successful installation:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes for any residual power to drain.
- Locate the ECM: On a 2009 Corvette ZR1, the ECM is located in the right-hand (passenger side) engine compartment. On other models, it may be on the firewall or near the air cleaner box (see fitment list for details).
- Disconnect Connectors: Carefully unlatch and remove the electrical wiring harness connectors from the old module. Inspect them for any dirt, moisture, or corrosion.
- Remove the Old Module: Unbolt the original ECM from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed ECM in place and securely fasten it.
- Reconnect Everything: Firmly plug the wiring harness connectors into the new module until they click. Reconnect the negative battery terminal.
- Final Step: Start the vehicle and let it idle for a few minutes. A security relearn procedure may be required on some models, which typically involves cycling the key. Your vehicle is now ready to drive.
Guaranteed Compatibility and Fitment
This module is a direct replacement for a broad array of GM vehicles and is fully interchangeable with the following service numbers: 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, 12630464, and 12678512. Please verify your vehicle is on the list below:
- Cadillac CTS (2009): 6.2L
- Cadillac DTS (2009-2011)
- Cadillac SRX (2009): 4.6L
- Cadillac STS (2009-2010): 4.4L, 4.6L
- Cadillac XLR (2009)
- Chevrolet Colorado (2009-2012): 2.9L, 3.7L
- Chevrolet Corvette (2009): ZR1
- Chevrolet Trailblazer (2009): 6.0L
- GMC Canyon (2009-2012): 2.9L, 3.7L
- GMC Envoy (2009): 5.3L
- Hummer H3 (2009-2010): 3.7L
- Buick Lucerne (2009-2011): 4.6L
- Saab 9-7x (2009)